US4873640A - Driving-speed adjusting arrangement - Google Patents

Driving-speed adjusting arrangement Download PDF

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Publication number
US4873640A
US4873640A US07/143,130 US14313087A US4873640A US 4873640 A US4873640 A US 4873640A US 14313087 A US14313087 A US 14313087A US 4873640 A US4873640 A US 4873640A
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United States
Prior art keywords
speed
vehicle
switching
threshold
signal
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Expired - Lifetime
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US07/143,130
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English (en)
Inventor
Peter Burk
Klaus Hahn
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Robert Bosch GmbH
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Robert Bosch GmbH
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Assigned to ROBERT BOSCH GMBH, A LIMITED LIABILITY COMPANY OF GERMANY reassignment ROBERT BOSCH GMBH, A LIMITED LIABILITY COMPANY OF GERMANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HAHN, KLAUS, BURK, PETER
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K31/00—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator
    • B60K31/02—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator including electrically actuated servomechanism including an electric control system or a servomechanism in which the vehicle velocity affecting element is actuated electrically
    • B60K31/04—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator including electrically actuated servomechanism including an electric control system or a servomechanism in which the vehicle velocity affecting element is actuated electrically and means for comparing one electrical quantity, e.g. voltage, pulse, waveform, flux, or the like, with another quantity of a like kind, which comparison means is involved in the development of an electrical signal which is fed into the controlling means
    • B60K31/042—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator including electrically actuated servomechanism including an electric control system or a servomechanism in which the vehicle velocity affecting element is actuated electrically and means for comparing one electrical quantity, e.g. voltage, pulse, waveform, flux, or the like, with another quantity of a like kind, which comparison means is involved in the development of an electrical signal which is fed into the controlling means where at least one electrical quantity is set by the vehicle operator
    • B60K31/045—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator including electrically actuated servomechanism including an electric control system or a servomechanism in which the vehicle velocity affecting element is actuated electrically and means for comparing one electrical quantity, e.g. voltage, pulse, waveform, flux, or the like, with another quantity of a like kind, which comparison means is involved in the development of an electrical signal which is fed into the controlling means where at least one electrical quantity is set by the vehicle operator in a memory, e.g. a capacitor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001—Electric control of rotation speed
    • F02D31/002—Electric control of rotation speed controlling air supply
    • F02D31/003—Electric control of rotation speed controlling air supply for idle speed control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
    • F02D2200/501—Vehicle speed

Definitions

  • the invention starts out from a vehicle-speed adjusting arrangement for motor vehicles.
  • This adjusting arrangement functions in combination with a driving-speed control unit for providing the desired value of the driving speed.
  • the adjusting arrangement has at least two switching contacts wherein the driving speed is increased when one of the contacts is closed and the driving speed is reduced when the other contact is closed.
  • the adjusting arrangement can have further switching contacts which, for example, can be utilized for switching in or switching out the driving-speed control unit or for retrieving a desired speed previously stored. Since driving-speed control units automatically cease to function below a minimal speed, for example at 40 km/h, for reasons of safety, the switching contacts of the driving-speed adjusting arrangement are freely accessible below the minimal speed and can be utilized for serving other functions.
  • the inventive use of the driving-speed adjusting arrangement below the minimum speed as an operating element for other functions affords the advantage that input elements such as switches or potentiometers can be dispensed with.
  • An application in a motor vehicle having a combustion engine comprises the presetting of the desired value of the no-load speed of the engine.
  • the driver can, for example, accelerate the use of the heating operation after the start or, when the mechanical no-load control unit malfunctions, the driver can control an emergency operation.
  • the contacts of the adjusting lever are separated from the additional electrical equipment beneath a first threshold of the driving speed which corresponds to the minimum speed in the controlled operation and above a second threshold of the driving speed.
  • the two threshold values are permanently set and lie, for example, at 40 km/h and 20 km/h.
  • the driving-speed adjusting arrangement operates exclusively on the driving speed regulating unit. Beneath the second threshold, analog or digitally operating circuit equipment is controlled with the switching contacts. In the simplest case, the on-off function of the switching contacts is used to directly switch on and off electrical units such as electrical motors.
  • a controllable ramp generator is suitable for changing an analog desired value by means of electrical switching contacts.
  • the output signal of the ramp generator In the neutral position of the driving-speed adjusting arrangement, the output signal of the ramp generator remains at a constant value.
  • the output signal drops or rises until the driving-speed adjusting arrangement is again brought into the neutral position.
  • Exceeding or dropping below permissable desired values by too long an actuation of the adjusting arrangement prevents a limit switching.
  • the adjusted desired value is useable for example as a control signal or as a command signal of control circuit.
  • Digital circuits can be advantageously driven with the switching contacts of the adjusting arrangement.
  • An up-down counter which is appropriately driven can be used for the digital desired-value presetting.
  • a limit of the adjustable values is purposeful also with the digital circuits.
  • the digital desired value can be directly used further, for example, as a command signal of a digital regulator; however, a translation into an analog value by means of a digital-analog converter is also possible.
  • the FIGURE shows an embodiment of the inventive application of a driving-speed adjusting arrangement for adjusting a desired value beneath a minimum speed with a signal processing arrangement.
  • the FIGURE shows a driving-speed adjusting arrangement 10 having first and second switching contacts 11, 12 which are switchable to ground 13 starting from the neutral position shown in the FIGURE.
  • the adjusting arrangement comprises, for example, a lever 10 which is mounted in the region of the steering wheel or comprises a pushbutton arrangement built into the control panel.
  • the two signal leads 14, 15 which are connected to the contacts 11, 12 are simultaneously connected to a first switching group 16 as well as to a second switching group 17.
  • the two leads 18 and 19 lead away from the first switching group 16 and are connected to a driving-speed control apparatus 20.
  • the two signal leads 21, 22 which lead away from the second switching group 17 are connected to a ramp generator 23.
  • An up-down counter is also useable in lieu of the ramp generator if digital signal processing is to be provided.
  • the first switching group 16 is driven by the output of a first comparator 24 and the second switching group 17 is driven by the output of a second comparator 25.
  • the two comparators 24, 25 are adjusted to fixed values of the driving speed and receive their input signals from a driving-speed transducer 26, which is also connected with the driving-speed control apparatus 20.
  • the driving speed control apparatus 20 receives a further signal from the accelerator-pedal transducer 27.
  • the output lead 28 of the controller 20 leads to a positioning member which is not discussed further here.
  • the output 29 of the ramp generator 23 or of the counter leads via a limiter 30 to a storage unit 31 at the output 32 of which a command signal is available.
  • the command signal is applied to the input 33 of a summing device 34.
  • the other input 35 of the summing device 34 receives a control signal from a control-signal transducer 36.
  • the control deviation at the output 37 of the summing device 34 is applied to the controller 38 at the output 39 of which a positioning signal is available. If required, the output 39 of the controller 38 is connected with the driving-speed control apparatus 20.
  • the arrangement shown in the FIGURE operates in the following manner.
  • the driving-speed adjusting lever 10 connects either the first contact 11 or the second contact 12 to ground 13.
  • the signal leads 14, 15 leading to both contacts 11, 12 are simultaneously connected to the first switching group 16 as well as also to the second switching group 17.
  • the first switching group 16 simultaneously connects the signal lead 14 with the signal lead 18 and the signal lead 15 with the signal lead 19 or simultaneously interrupts both connections.
  • the first switching group 16 is driven by the first comparator 24.
  • the first comparator 24 is adjusted to a fixed driving-speed value beneath which the two switches of the first switching group 16 are opened and above which the switches are closed.
  • the threshold lies, for example, at 40 km/h. If the driving speed is above this threshold, then the driving-speed control apparatus 20 is appropriately driven via the driving-speed adjusting lever 10.
  • a connection of the first switching contact 11 with ground 13 leads, for example, to an increase in the driving speed and a connection of the second switching contact 12 to ground 13 leads to a drop in the driving speed.
  • the driving-speed control apparatus 20 receives the actual value of the driving speed from the driving-speed transducer 26. This signal is likewise applied to the first comparator 24.
  • the driving-speed control apparatus 20 receives at least still one further input signal which is provided by the accelerator-pedal transducer 27.
  • the accelerator-pedal transducer 27 acts alone on the driving-speed control apparatus 20 beneath the first threshold value of the driving speed when both switches of the first switching group are open. Above this first threshold, the accelerator-pedal transducer 27 only has an influence on the control apparatus 20 when the adjusting lever 10 is in the neutral position shown.
  • the second switching group 17 is driven by a second comparator 25. Both switches of the second switching group 17 are closed below a second threshold of driving speed which can, for example, be at 20 km/h so that the two signal leads 14, 21 are connected with each other and the two signal leads 15, 22 are connected with each other.
  • a second threshold of driving speed which can, for example, be at 20 km/h so that the two signal leads 14, 21 are connected with each other and the two signal leads 15, 22 are connected with each other.
  • the two leads 21, 22 are control leads of the ramp generator 23.
  • the ramp generator 23 provides an increasing signal at its output 29 when the adjusting lever 10, for example, connects the first switching contact 11 to ground 13 and provides a decreasing signal when the adjusting lever 10 connects the second switching contact 12 to ground.
  • the output signal 29 does not change when the adjusting lever 10 is in the neutral position shown.
  • the output signal 29 likewise does not change when the second threshold of the driving speed is exceeded which is preset by the second comparator 25, and as a consequence thereof, the two switches of the second switching group 17 are opened.
  • the analog output signal 29 corresponds, for example, to the desired value which is to be controlled (open loop or closed loop).
  • a limiter 30 is provided after the ramp generator 23.
  • the limiter 30 limits the upper and/or lower amount of the desired value to permitted values. If the limiter 30 is not provided, then a limitation of the desired value by the ramp generator 23 necessarily takes place which, in a limiting situation, is a function of its output circuitry and the available supply voltage. If the desired value reaches a limit value, for example, by connecting the first switching contact 11 with ground 13, a connection continuing therebeyond has no more influence on the desired value. In this case, a change can result only by means of a connection of the second switching contact 12 with ground 13.
  • the adjusting lever 10 no longer operates on the ramp generator 23 when the signal delivered by the driving-speed transducer 26 lies above the threshold preset by the second comparator 25 and the two switches of the second switching group 17 are thereby opened.
  • the storage unit 31 is provided which, for example, can be configured as a sample and hold circuit.
  • the signal at the output 32 of the storage unit 31 can be utilized for control purposes; however, it can also be used as a command signal of a control loop of which the following are shown: the summing device 34 with the two inputs 33, 35; the control-signal transducer 36; and, the actual controller 38.
  • the controller 38 generates a control signal at its output 39 in dependence upon the control deviation occurring at the output 37 of the summing device 34. If the connection shown in the FIGURE of the controller output 39 with the driving-speed control apparatus 20 is present, then the no-load speed of an internal combustion engine can be adjusted with the arrangement shown if the control-signal generator 36 detects the engine speed.
  • the described analog-signal processing between the second switching group 17 and the summing device 34 can be advantageously replaced by digital-signal processing. It is also here essential that, above the first threshold of the driving speed preset by the first comparator 24, the driving-speed adjusting lever 10 coacts with the driving-speed control apparatus 20 via closure of the two switches contained in the first switching group 16 and, beneath the second threshold of the driving speed preset by the second comparator 25, the adjusting lever 10 is applied for controlling other functions by closure of the two switches contained in the second switching group 17.
  • a speed region lies between the first and second thresholds of the driving speed in which the adjusting lever 10 can be switched without having any function by opening all switches of the first and second switching groups 16, 17.
  • the two signal leads 21, 22 control the up-down counter which takes the place of the ramp generator 23.
  • An upward counting operation takes place as long as the adjusting lever 10, for example, connects the switching contact 11 to ground 13 and a downward counting operation takes place as long as the second switching contact 12 is switched to ground 13.
  • the counter position at the output 29 of the counter 23 corresponds to a desired value which is limited in the following digital limiter 30 to an upper and/or lower.
  • a storage unit 31 is also provided for the case that the desired value is to be stored after switching off the vehicle.
  • An electrically clearable fixed value memory is here especially suitable as a storage element of the digital desired value which retains its information also after switching off the supply voltage.
  • a transition from digital to analog signal processing is made possible by a digital-to-analog converter as may be required. As already described, this signal can be applied for the open-loop or closed-loop control of functions.
  • the arrangement permits a no-load speed control of an internal combustion engine when the connection is present shown between the control output 39 and the driving-speed control apparatus 20 and when the control-signal transducer 36 detect the engine speed.
  • the digital components are realized as a microprocessor circuit
  • the summing device 34 and the controller 30 are realized appropriately as a computer program. Retaining the digital-signal processing is then especially advantageous when the circuits (here, for example, the driving-speed control apparatus 20) which follow likewise perform digital signal processing.
  • the two switching leads 21, 22 directly initiate switching operations beneath the second driving-speed threshold. Adjusting operations which are preferably made when the vehicle is stationary are, for example, the adjustment of the rear view mirror or of the seat. In lieu of a ramp generator or up-down counter 23, a switching stage is then provided for driving electric motors.
  • a further application of the arrangement according to the invention is the adjustment of limit values such as, for example, the highest speed of the vehicle engine or the adjustment of the maximum driving speed.
  • the two signal leads 21, 22, in addition to the corresponding limit circuit, also act on the electronic indicating element for the engine speed or the driving speed so that the value to be adjusted can be read directly.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Controls For Constant Speed Travelling (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
US07/143,130 1986-04-19 1987-01-15 Driving-speed adjusting arrangement Expired - Lifetime US4873640A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3613322 1986-04-19
DE19863613322 DE3613322A1 (de) 1986-04-19 1986-04-19 Fahrgeschwindigkeits-einstellvorrichtung

Publications (1)

Publication Number Publication Date
US4873640A true US4873640A (en) 1989-10-10

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ID=6299107

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Application Number Title Priority Date Filing Date
US07/143,130 Expired - Lifetime US4873640A (en) 1986-04-19 1987-01-15 Driving-speed adjusting arrangement

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US (1) US4873640A (de)
EP (1) EP0268593B1 (de)
JP (1) JPS63503054A (de)
DE (2) DE3613322A1 (de)
WO (1) WO1987006200A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4960091A (en) * 1988-10-29 1990-10-02 Vdo Adolf Schindling Ag Safety circuit for electronic velocity control or regulating systems for motor vehicles
US5350034A (en) * 1991-07-08 1994-09-27 Japan Electronic Control Systems Co., Ltd. Apparatus for controlling opening angle of throttle valve in internal combustion engine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4510899A (en) * 1979-09-17 1985-04-16 Muncie Power Product Inc. Electronic overspeed switch
US4606425A (en) * 1980-09-09 1986-08-19 Toyota Jidosha Kogyo Kabushiki Kaisha Vehicle speed control apparatus
US4737913A (en) * 1984-07-27 1988-04-12 Ae Plc Automatic speed control systems

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2431935A1 (fr) * 1978-07-27 1980-02-22 Renault Regulateur d'allure pour un vehicule automobile

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4510899A (en) * 1979-09-17 1985-04-16 Muncie Power Product Inc. Electronic overspeed switch
US4606425A (en) * 1980-09-09 1986-08-19 Toyota Jidosha Kogyo Kabushiki Kaisha Vehicle speed control apparatus
US4737913A (en) * 1984-07-27 1988-04-12 Ae Plc Automatic speed control systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4960091A (en) * 1988-10-29 1990-10-02 Vdo Adolf Schindling Ag Safety circuit for electronic velocity control or regulating systems for motor vehicles
US5350034A (en) * 1991-07-08 1994-09-27 Japan Electronic Control Systems Co., Ltd. Apparatus for controlling opening angle of throttle valve in internal combustion engine

Also Published As

Publication number Publication date
JPS63503054A (ja) 1988-11-10
EP0268593A1 (de) 1988-06-01
WO1987006200A1 (en) 1987-10-22
EP0268593B1 (de) 1990-06-06
DE3613322A1 (de) 1987-10-22
DE3763035D1 (de) 1990-07-12

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